Nozzle for air brushes



B. I5. HoLToN.

NOZZLE FOR AIR BRUSHES.

APPLICATION FILED APR. 29. 1920.

Patented sept. 2e, 1922..

:Bracnenn E. HoLToN, oF Los ANGELES, cALIroRN-ia.

NozzLE son am .BRUsHEs 'Application' led April 29, 1920. Serial No. 377,660.

- To all wzo/mz't may concern:

Be it known that I, BrRcHARn E. HoLToN, a citizen of the United States, residing at Los Angeles, and Stateof California, have invented new an'd useful Improvements in Nozzles for Air Brushes, of which the following is -a specification. l

This invention is a nozzle for air brushes, and has for its object the provision of a nozzle arranged so that either a straight spray of the. coating material or a fanshaped spray may be applied by the air brush.

The invention will be readily understood from the following description of the accompanying drawings, in which- Figure 1 is a side elevation, partly broken n away, of an air brush having theim'proved nozzle.

Fig. 2 is a top plan view of the nozzle, partly broken away, with the nozzle turned to form afan-shaped spray. Y

Fig. 3 is a longitudinal section on the line 3 3 of Fig. 2.

Fig. 4 is a transverse section on the line 4-4 of Fig. 2. I

Fig. 5 is a View similar to Fig. 4 with the nozzle turned to produce a straight spray.

Fig. 6 is a view similar to Fig. 3 of a modied form of the invention.

The air brush i to which the improved nozzle is applied may comprise a usual receptacle 1 forming a reservoir for the liquid to be applied bythe brush and having the discharge nozzle 2 for said liquid, prefarranged upon k,the top of the receptacle. .This discharge nozzle is, preferably, adjustable in usual manner for controlling the amount of the liquid discharged therethrough. The air nozzle for the brush 1s also mounted upon the top of the receptacle 1 and is arranged to discharge a blast of air across the end of nozzle 2 for forcing the liquid from the receptacle through the discharge nozzle and against the surface which is to be coated. i

The air nozzle `is shown as comprising a easing 3 having a main conduit 4 communieating with an osetponduit 5 by way of a cross conduit 6. A duit 5 with the usual v'alve controlled connection leading to an air hose-8." This connection comprises a conduit 9 controlled by the valve 10 having a manually actuated valve stem l1 for controlling the amount of in the county of Los Angeles v ed to the casing by a threaded -so that the cap is free to rotate upon the pipe 7 connects the conair passing fromothe air hose through the air nozzle.

opposite points along converging lines to- 65.

ward the mouth of the liquid discharge nozzle and across the same for producing a fanshaped spray.. l

, As an instance of thisarrangement a cap thereo is arranged to be received over the end of the nozzle casing through which the condult 4 extends with the disc arge nipple forming a longitudinal continuation of the the end of th'e liquid dis- 60 ,13 having the discharge nipple 14 in the end 70 conduit 4. The cap is, preferably, connectit connection 15 n ozzle casing. The rotation of the cap tive to the nozzle casing is, ited to a quarterturn as 16 threaded in the nozzle casing and projecting radially therefrom and received inv a notch 17 provided in the' edge of the cap 13, the parts being so arranged that when the cap is turned the against one or the other notch 17, will limit the turning movement of the cap-to a quarter turn.

When it is desired 'to produce a straight relapreferably, limby means of a pinl pin, by abutment 85 of the ends of the spray theair from conduit 4 Ais discharged 90 through the nipple 14 only, ing a straight blast across the end of the liquid discharge nozzle. When, however, 1t 1s desired to form a fan-shaped blast, the dlscharge nipples 18 aremunicate with the conduit 4. These nipples shown as two in number extend laterally from diametrically Opposite sides ofthe cap 13, as clearly shown in Fig. 2 and are then bent toward the air nozzle andv charge nipple 14. y this arrangement it will.- be seen that if. air is discharged through both the'nipple thereby producconverge toward the dis- 14 and the nipples 18, a converging blast of 105 air is produced which, after the converging currents 'have crossed, will producel a diverging fan-shaped blast. The air discharge nozzle isso positioned liquid discharge nozzle that crossing of the converging currents will be approximately above the-end ofithe liquid relative to the/ the point of 110 caused to comdischarge end of the discharge nozzle so that the spray of liquid formed by the air brush vvill be of the shape of the atore mentioned fan-shaped blast.

rllhe discharge nipples 18 extend through the cap 13 and the latter is provided with diametrically opposite ports 19 arranged, when the cap 13 is turned to one of its limits of turning movement, to communicate with the respective. nipples 18 so that the air from conduit l may be discharged through both nipples 18 and the nipple 14, thereby forming the fan-shaped blast. as previously described. Yhen, however, the cap 13 is turned to its other limit of turning movement the ports 19 are out of communication with the nipples 18, and as a consequence the air blast from conduit et will be discharged through nipple 14C only, thereby producing a straight blast.

1n the modicat-ion of the invention illustrated in Fig. 6 the air blast and the coat-v ing` material are discharged through the saine nozzle, this nozzle being arranged to produce eitherl a. straight spray or a fanshaped spray, as previously described. 1n this form of the invention the nozzle casing 3 has a main conduit 4 communica-ting with a. pipe 25 through which the coating material is Supplied. The conduit 4c also communicates with an offset conduit 5 by Way of a cross conduit 6. r1`he air is supplied through conduit 5 which for this purpose is shown connected to a pipe T. The supply of air and coating material through their respective supply pipes may be controlled by any suitable valve mechanism, not shown, to obtain the desired proportion of air to coating material.

The casing 3 is provided with means, such as previously described, for discharging the mixture of air and coating material from conduit 1' either through a central discharge nipple 141 for forming a straight spray or through both this nipple and the laterally and then inwardly converging discharge nipples 18 to produce a fan-shaped blast. llt Will be understood that the nipple 14; is carried by a cap 13, such as previously described, and arranged to be rotated by a quarter turn upon the casing 3 so as to open or close nipples 18 to the conduit l", as

previously described.

By the construction as thus set forth it vvill be seen that ll produce a nozzle for an air brush by means of which the liquid spray produced by the air brush may be readily changed from a straight spray to a fan-shaped spray, the nozzle, as t-hus constructed, being either an air nozzle. varranged to discharge across the end of the liquid discharge nozzle for producing a liquid spray, or a combined liquid and air discharge nozzle.

llt will be further observed that the irnproved nozzle thus arranged to produce either a straight or fan-shaped spray is also adapted to have the proportion of liquid in. the spray varied as may be found desirable.

Various changes may be made without departing from the spirit oit the invention as claimed.

1What is claimed is:

A nozzle'of the character described comprising a casing, a threaded and shouldered extension formed on the casing, said casing and extension being formed with a conduit and diametrically disposed ports formed in the extension and communicating with the conduit, a cap threadedly mounted on the extension and abutting said shoulder, the inner end of said cap being formed with a recess, a discharge nipple Within the cap and in axial a-linement with said conduit, divergently arranged nipples sustained on the cap and adapted t-o communicate with said ports when the cap is in a predetermined position, and a pin mounted in the casing and engaging Within said recess for delining the rotational movement of the cap in either direction.

lln testimony whereof ll have signed my name to this specification.

sinceri-ian is. Hotton. 

